The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2014
Filed:
Mar. 03, 2011
Hiroki Iwai, Saitama, JP;
Hiroki Iwai, Saitama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
An exemplary tuning-fork type piezoelectric vibrating piece has a rectangular base having upper and lower main surfaces and a pair of vibrating arms extending longitudinally from the base. The vibrating arms also have the upper and lower main surfaces. Each main surface of each vibrating arm defines a respective vibrating-arm groove extending longitudinally into the base. Each main surface of the base has at least one respective step-side surface situated outboard, in an X-axis direction, of each vibrating-arm groove. Each step-side surface is parallel with the respective vibrating-arm groove. A first electrode is situated on the vibrating-arm grooves of the first vibrating arm and on the at least one respective step-side surface on each main surface. A second electrode is situated on the vibrating-arm grooves of the second vibrating arm and on the at least one respective step-side surface on each main surface. The first and second electrodes are energized with different electrical polarities.